Tree features that use the alter_ground tree decorator are not working how they should, this is most likely related to the change to this tree decorator to now use rule-based block state provider
This can be seen very easily from vanilla’s own use of the decorator in the mega_spruce and mega_pine features and how they cover the surroundings with podzol
You can replicate this by going to the old_growth_spruce_taiga or old_growth_pine_taiga biomes and seeing floating podzol, or by planting a 2x2 spruce tree
The expected result would be to replace the surface material with podzol
Instead the podzol blocks get place 2 blocks higher floating over the surface
ps. I hope the bug tracker gets improved, I miss the old one
Thank you for helping us improve Minecraft! We saved your files: